Page 233 - 2018_IRC

WALL CONSTRUCTION

R602.10.6.5 Wall bracing for dwellings with stone Where detached one- or two-family dwellings in
and masonry veneer in Seismic Design Categories Seismic Design Categories D , D and D have exterior
0
1
2
D , D and D . Where stone and masonry veneer are veneer installed in accordance with Section R703.8 and
1
2
0
installed in accordance with Section R703.8, wall brac- are braced in accordance with Method WSP or CS-
ing on exterior braced wall lines and braced wall lines WSP, veneer shall be permitted in the second story in
on the interior of the building, backing or perpendicular accordance with Item 1 or 2, provided that the dwelling
to and laterally supporting veneered walls shall comply does not extend more than two stories above grade
with this section. plane, the veneer does not exceed 5 inches (127 mm) in
thickness, the height of veneer on gable-end walls does
Where dwellings in Seismic Design Categories D ,
0
D and D have stone or masonry veneer installed in not extend more than 8 feet (2438 mm) above the bear-
2
1
accordance with Section R703.8, and the veneer does ing wall top plate elevation, and the total length of
not exceed the first-story height, wall bracing shall be braced wall panel specified by Table R602.10.3(3) is
in accordance with Section R602.10.3. multiplied by 1.2 for each first- and second-story
braced wall line.
Where detached one- or two-family dwellings in 1. The total area of the veneer on the second-story
Seismic Design Categories D , D and D have stone or exterior walls shall be permitted to extend up to
1
0
2
masonry veneer installed in accordance with Section 25 percent of the occupied second floor area.
R703.8, and the veneer exceeds the first-story height,
wall bracing at exterior braced wall lines and braced 2. The veneer on the second-story exterior walls
wall lines on the interior of the building shall be con- shall be permitted to cover one side of the dwell-
structed using Method BV-WSP in accordance with ing, including walls on bay windows and similar
this section and Figure R602.10.6.5. Cripple walls shall appurtenances within the one dwelling side.
not be permitted, and required interior braced wall Townhouses in Seismic Design Categories D , D 1
0
lines shall be supported on continuous foundations. and D with stone or masonry veneer exceeding the
2
first-story height shall be designed in accordance with
accepted engineering practice.
EXTENT OF HEADER WITH DOUBLE PORTAL FRAMES (TWO BRACED WALL PANELS)
EXTENT OF HEADER WITH SINGLE PORTAL FRAME
(ONE BRACED WALL PANEL)
FASTEN KING STUD
2′-18′ FINISHED WIDTH OF OPENING TO HEADER WITH 6
FOR SINGLE OR DOUBLE PORTAL 16D SINKERS
TENSION STRAP PER
TABLE 602.10.6.4
PONY WALL (ON OPPOSITE SIDE
HEIGHT OF SHEATHING)
MIN. 3″ x 11¼″ NET HEADER STEEL HEADER PROHIBITED
IF ½″ SPACER IS USED, PLACE ON BACK-SIDE OF HEADER IF NEEDED, PANEL FASTEN TOP
12′ MAX. TOTAL WALL HEIGHT 10′ MAX. HEIGHT PATTERN AS SHOWN BLOCKING WITHIN THE HEADER WITH
SPLICE EDGES SHALL
FASTEN SHEATHING TO HEADER WITH 8D
OCCUR OVER AND BE
COMMON OR GALVANIZED BOX NAILS IN 3″ GRID
PLATE TO
NAILED TO COMMON
MIDDLE 24″ OF THE
TWO
HEADER TO JACK-STUD STRAP PER TABLE
ROWS OF 16D
PORTAL-LEG HEIGHT.
R602.10.6.4 ON BOTH SIDES OF OPENING
ONE ROW OF 3″ O.C.
SINKER NAILS AT
OPPOSITE SIDE OF SHEATHING
3″ O.C. TYP.
NAILING IS REQUIRED
IN EACH PANEL EDGE.
MIN. DOUBLE 2″ x 4″ FRAMING COVERED WITH MIN.
7 /16″ THICK WOOD STRUCTURAL PANEL SHEATHING
STRUCTURAL
WITH 8D COMMON OR GALVANIZED BOX NAILS AT
FRAME CONSTRUCTION
PANEL
3″ O.C. IN ALL FRAMING (STUDS AND SILLS) AS
SHEATHING
SHOWN TYP. TYPICAL PORTAL MIN. 7 /16″ WOOD
MIN. DOUBLE 2 x 4 POST
MIN. LENGTH OF PANEL PER TABLE R602.10.5 (KING AND JACK STUD)
NUMBER OF JACK
STUDS PER TABLES
MIN. (2) ½″ DIAMETER ANCHOR BOLTS R602.7(1) & (2)
INSTALLED PER SECTION R403.1.6 WITH
2″ x 2″ x 3 /16″ PLATE WASHER
INTERMITTENT BRACED
WALL PANEL REQUIRED
ADJACENT OPENING
FOR SINGLE PORTAL
FRAME
ANCHOR BOLTS PER
SECTION R403.1.6
FRONT ELEVATION SECTION
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
FIGURE R602.10.6.3
METHOD PFG—PORTAL FRAME AT GARAGE DOOR OPENINGS IN SEISMIC DESIGN CATEGORIES A, B AND C
208 2018 INTERNATIONAL RESIDENTIAL CODE ®
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